Calculating-machine.



FL MUHN.

CALCULATING MACHINE.

AFPUcATroN FILED APR, 14.- :915.

1,145,355. Patented July 6,1915.

`The present invention RUDOLF MOHN, OF SULGEN, SWITZERLAND.

cALcULa'riNe-iviecninn.

Liiaeee.

Specification of Letters Patent.

ratentedauiy'e;i915@ Application filed April 14, 19.15. Serial No. 21,295.

T0 ,all 'whom 'it may concern Be it'known that I, RUDOLF Morin, a citi- Zen of Switzerland, and residing at Sulgen, Switzerland, have invented certain new and useful Improvements in Calculating-Machines, of which the following' is a speci.- c'ation. Y

' has reference to improvements in calculating machines, and relates more particularly to auxiliary means in connection with the 'ordinary actuating mechanism of a calculating machine of the Thomas or like type for greatly 'simplifying the manipulation of the machine by reducing; the number of turns to be given the crank handle in sending a set up item through the machine; -and the specific object ofthe invention is to provide means whereby with the saine cra-nk sha-ft addition, as well as multiplication operations with a multiplier from 1-9, can be carried out, with a single or only a partial-crank revolution.

ln order to make the invention more 'readily understood, l-will now describe it in detail with. reference to 'the accompanying drawing, in whichV auxiliary mechanism; Fig. a plan view thereof, with the cover partly broken away; Fig. 3 a rear elevation looking in 'the direction of arrow A in Figa 1, and Fig. 4 a side view of Figij in the direction of the arrow B.

The shaft 2 carries at its forward end the crank handle 1 and near its inner end the bevel gears 3.and 4, which are secured thereon by meansof the key 5 3) in such :manner that they can be axially displaced on the shaf-t but are prevented from rotation relative thereof. lThe bevel wheel 4 in its one end position meshes with the bevel' wheel 6, which latter is suitably axially displaceable on the shaft 6*, but is not rotatable relative thereto. On the shaft 6* Iis also fixed the bevel wheel Z which meshes with the bevel wheel 8. This latter is V rigidly secured to the toothed wheel @which meshes with the toothed wheel 10, and this latterv is fixed on the hub 12* of the bevel wheel 12 together with the vtoothed wheel 11, so that these'.l three wheels 10, 11 and 12 freely rotate in unison about the stud 13 supporting the common hub-12*.' The Wheel 11 is connected over the wheel train 14 with the other actuating mechanisms of Figure 1 represents aside elevation of the the machine, which are. omittedl from the drawingr as they have no bearirne:u on the invention. L

ln the. circumferential groove 15,v of the hub of the bevel wheel 6 and in the groove 16 of the common hub of, the bevel wheels 3 and 4 engage respectively the tappets 17 and 18 supportedon the angleleversl, which latter are pivoted by meansof' the shaft 21 in thebracketbearing 20, to which latter is also pivoted the swing ,arm` .22 which is connected by the drawrod23 with the setting-lever 24. A Y ,y

On the bevel wheel 'i' is secured co-.axially thereof the pinion 25 which is vadapted to be brought into mesh with the rack bar 26.

The latter is pivoted along its lower edge latter being guided in standards `and carrying a setting le'ver 30v, whose npper'end extends through a slot 31 in the' coverfplate 32 of the machine case. The sides ofgthis slot bear marks numberedv from .1 to'i`9, and the slot may normally be coveredhp by spring-,actuated slide,l not specially shown in the drawing. j c In operating the described mechanism .for carrying out an addition, the push lever'2'4 is shifted in the direction of the arrow a. (Fig. 1) which causes the bell crank lever 19 to oscillate to such an extent that the wheel 6 is displaced in the direction of arrow b (Fig. 2) and the 'wheels 3 and 4 are` shifted in the direction of the arrow o, with the result that the wheels 4 and il are disconnected and the wheels 3 and 12 are thrown int'o mesh. The push lever 30 is shifted laterally in the direction of the arrow al', which causes the toothed rack 26 to di -nect from the pinion 25, as shown in dot d lines in Fig. 3. lf now the crank handle is manipulated, the rotation of the shaft 2 is transmitted in turn through the bevel wheels 3 and 12 to the toothed wheel 11 and over the wheel train 14 to the other mechanisms.

For carrying out multiplications, the set lever 24 `is brought into the position in which the bevel wheels 3 and 12 are disconnected and 'the bevel wheels 4 and6 are in mesh. Next the lever 30 is shifted in its slot 31 t0 the mark corresponding to the numeral with which the multiplication to b'e carried out, and by oscillating the lever in the direction opposite to that indicated by the arrow d; the toothed rack 26 is thrown into gear with The rotation of the wheel 7 is transmitted' to the wheelll over the wheels 8, 9 and 10, and the wheel ll then actuates the wheels 14 and the machine mechanism proper.

The ratio of gearing of the bevel wheels 7 and 8 is 9:1, that'is to say, thewheel 7 for ea'ch complete revolution causes the wheel 8 to rotate nine times, and thus obviously for each single revolution of the handle 1, the p toothed wheel ll will make 9 complete revolutions. lIt is clear then that Ythe other operating wheels of the machine will proportionately be actuated nine times as extensively, and a 9 multiplication is carried out at a single rotation of the handle, where formerly nine such handle revolutions were required.l If a number is to nbe multiplied by less than 9 the lever 30- is shifted in its slot 3 1 to the respective multiplier mark, say 7 in consequence of whichthe actuation of the mechanism is stopped correspondingly earlier, owing to the pinion 25 running up against the now less distant stop' The toothed wheel l1 revolves only seven times and the rest of the mechanism follows suit and the set up item is multiplied by 7 After the multiplication operation the lever 30 is shifted again in the direction of the arrow d, when the rack bar 26 isagain disconnected from the pinion, which clears the machine for a fresh operation.

What I claim and desire to secure by Letters Patent is 1. In a calculating machine, in combination with an adding and a multiplying mechanism, a crank handle and a crank shaft, a pair of bevel gears, rigidly connected vand axially displaced on said crank shaft, and means for alternately coupling one of said gears to the adding mechanism and the other to the multiplying mechanism, the latter having a ratio of gearing of 9 :1 relative to' the last said bevel gear, for the purpose of imparting to the multiplying mechanisml an angular velocity nine times as high as that of the crank handle.

2. In a calculating machine, in combination with an adding and a multiplying mechanism, a crank handle and a crank shaft,a pair of bevel gears, rigidly connected and axially displaceable -on said crank shaft, means for alternately coupling one of said gears to the adding mechanism and the other to the multiplying mechanism, means for limiting the extent of the actuation of the multiplying mechanism, comprising a pinion driven from the said crank shaft at aratio of 9 :1, a tiltable rack bar, a stop ledge thereon, means for tilting said rack barinto, or out of, mesh with said pinion, and indicator means for shifting said rack bar relative to said pinion according to the multiplier chosen.

In testimony whereof I affix my signature in presence of two witnesses.

RUDOLF MOHN.

` Witnesses:

WALTER STANDER, FRANK TINNEKE.' 

